メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.394401523864 44.1693583556873, 142.393284655752 44.1691795650973, 142.393128357144 44.1691465692781, 142.392892558569 44.1691076974626, 142.392833969268 44.169098047839, 142.393109990072 44.1683146723644, 142.393557336345 44.1683856443704, 142.394648531328 44.1685892692285, 142.394401523864 44.1693583556873)) ^^http://www.opengis.net/ont/geosparql#wktLiteral